diff --git a/app/monitor.py b/app/monitor.py
new file mode 100644
index 0000000..e07e6a7
--- /dev/null
+++ b/app/monitor.py
@@ -0,0 +1,81 @@
+import asyncio
+from datetime import datetime, timezone
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from app.ai_bot import AiTradingBot, decision_to_dict
+from app.demo_account import DemoAccountService
+from app.legacy_bot import LegacyBotService
+
+
+class SignalMonitor:
+    def __init__(self, ai_bot: AiTradingBot, demo_service: DemoAccountService, legacy_bot: LegacyBotService) -> None:
+        self.ai_bot = ai_bot
+        self.demo_service = demo_service
+        self.legacy_bot = legacy_bot
+        self.running = False
+        self.last_status = 'Остановлен'
+        self.last_market = ''
+        self.last_action = ''
+        self.last_score = 0.0
+        self.last_error = ''
+        self.last_run_at: datetime | None = None
+
+    def status(self) -> dict[str, Any]:
+        return {
+            'running': self.running,
+            'status': self.last_status,
+            'last_market': self.last_market,
+            'last_action': self.last_action,
+            'last_score': self.last_score,
+            'last_error': self.last_error,
+            'last_run_at': self.last_run_at.isoformat() if self.last_run_at else None,
+        }
+
+    async def loop(self, session_factory, interval_seconds: int = 20) -> None:
+        self.running = True
+        self.last_status = 'Запущен'
+        while self.running:
+            try:
+                with session_factory() as db:
+                    await self.tick(db)
+            except Exception as exc:  # noqa: BLE001 - monitor must not kill the app
+                self.last_error = str(exc)
+                self.last_status = 'Ошибка мониторинга'
+            await asyncio.sleep(interval_seconds)
+
+    def stop(self) -> None:
+        self.running = False
+        self.last_status = 'Остановлен'
+
+    async def tick(self, db: Session) -> dict[str, Any]:
+        state = self.ai_bot.get_or_create_state(db)
+        self.last_run_at = datetime.now(timezone.utc)
+        if not state.enabled:
+            self.last_status = 'Бот выключен'
+            return self.status()
+        if state.emergency_stop:
+            self.last_status = 'Emergency stop'
+            return self.status()
+
+        decision = await self.ai_bot.make_decision(db, None)
+        data = decision_to_dict(decision)
+        self.last_market = decision.market
+        self.last_action = decision.action
+        self.last_score = decision.score
+
+        if state.trade_mode == 'demo' and decision.action in {'buy', 'sell'} and decision.score >= state.min_signal_score:
+            price = float(data['indicators']['last_price'])
+            amount = max(1.0, state.max_quote_per_trade) / price
+            trade = self.demo_service.add_demo_trade(db, decision.market, decision.action, price, amount, decision.reason)
+            decision.executed = True
+            db.add(decision)
+            db.commit()
+            self.legacy_bot.snapshot_history(db)
+            self.last_status = f'Открыта демо-сделка {trade.side.upper()} {trade.market}'
+        elif state.trade_mode == 'live':
+            self.last_status = 'Найден live-сигнал, ожидает live adapter'
+        else:
+            self.last_status = 'Сигнал слабый, сделка не открыта'
+        return self.status()